Key facts
From KisanPe's verified data. Confirm prices and doses with the seller, label or official source before acting.
- Category
- Herbicide
- Mode of action
- Systemic Selective
- Target crops
- Soybean, Cotton, Groundnut, Black Gram
- Target pests
- Echinochloa (Sanwa), Eleusine (Kodo), Dactyloctenium, Digitaria
Chemical Class and ACCase Enzyme Inhibition
Quizalofop Ethyl belongs to the 'Fops' chemical class (HRAC Group 1 - ACCase inhibitors). It acts by inhibiting the enzyme acetyl-CoA carboxylase, which catalyzes the first committed step in de novo fatty acid biosynthesis in grasses.
Broadleaf crops possess an insensitive eukaryotic form of ACCase, making the herbicide highly selective for broadleaf crops. In susceptible grassy weeds, lipid synthesis stops, cell membrane production ceases, and growing points turn brown and die within 7 to 10 days.
- HRAC Group 1 Mode of Action: Inhibits acetyl-CoA carboxylase, terminating fatty acid production in grasses.
- High Broadleaf Selectivity: Completely safe for broadleaf crops like soybean, cotton, groundnut, and black gram.
- Rapid Systemic Movement: Rapidly absorbed through leaf cuticles and translocated acropetally and basipetally to root rhizomes.
Target Grassy Weeds in Field Crops
Aggressive annual and perennial grasses compete heavily with emerging field crops for nitrogen and soil moisture. Quizalofop Ethyl 10% EC delivers control across problematic grass species.
Key controlled grasses include Echinochloa colona (jungle rice / sawan), Dactyloctenium aegyptium (crowfoot grass), Digitaria sanguinalis (crabgrass), Eleusine indica (goosegrass), and perennial Cynodon dactylon (doob grass).
- Barnyard Grass Control: Eliminates Echinochloa species infesting soybean and groundnut fields.
- Rhizome Suppression: Systemic translocation suppresses subterranean nodes of perennial grasses.
- Crop Yield Preservation: Relieves weed competition during early vegetative and flowering growth stages.
Application Timing and Spray Guidelines
Apply Quizalofop Ethyl 10% EC as an early post-emergence spray when grassy weeds are actively growing at the 2 to 4 leaf stage (typically 15 to 25 days after sowing). Ensure adequate soil moisture is present during application.
Use a knapsack or tractor boom sprayer fitted with flat fan nozzles to achieve uniform foliar coverage. Avoid spraying during severe drought or when crops are under acute moisture stress.
- Optimal Weed Stage: Spray when grassy weeds are actively growing at 2 to 4 leaves.
- Soil Moisture Requirement: Adequate moisture ensures rapid weed absorption and translocation.
- Nozzle Selection: Flat fan nozzles produce even, overlapping spray fans across crop rows.
Official source
Check the latest rules, benefits and forms here. KisanPe is an independent platform and is not a government website.
Central Insecticides Board & Registration Committee (CIBRC) ↗Related on KisanPe
Common questions
What type of herbicide is Quizalofop Ethyl 10% EC?
It is a selective systemic post-emergence graminicide that specifically controls grassy weeds in broadleaf crops.
Can Quizalofop Ethyl 10% EC be sprayed over soybean and cotton?
Yes, it is highly selective and safe for broadleaf crops including soybean, cotton, groundnut, and pulses.
Does Quizalofop Ethyl control broadleaf weeds like Trianthema?
No, it targets only grassy (monocot) weeds; it has no herbicidal activity against broadleaf (dicot) weeds.
General guidance, not personal advice. For your farm, ask your local Krishi Vigyan Kendra or agriculture officer.
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